I had some issues with one of my Ikea trådfri zigbee power outlets. It was connected directly to Homey. It would spontaneously leave my Zigbee network. I would get a notification from Homey with a message: "Zigbee device device name left the network. After that, the device had an exclamation mark on its icon and I could not control it. I think that I had this issue with this device before but then it went away and then after couple of weeks it was back.
It seemed that the outlet would spontaneously resets itself and then leave the network. After that it would continue to reset on its own every couple of minutes.
In the end, I replaced that outlet with a new one but the new one left the network as well only after couple of weeks of being in use.
Did any of you have a similar issue? Maybe the first device was broken but now with a new one I am more suspicious. I have a Sonos Sub connected to it and the outlet is maybe 5-6 meters away from Homey in more or less a straight line with no walls in between.